Calibrating radiator-valve.



E. C. WiLEY.

CALIBRATING RADIATOR VALVE.

APPLICATION-FILED OCT. 31. 19:4.

Patented Jan; 18, 1916.

m 0 4 I 3 W 5 \A I, F, 6 3 0 7 4 m 3 a J r v g 0 2 6 4 3w, m #5: i w g Iw w A Z. 1 w w ,v p fi F i w w S 0 s i n W ATTORN EY water heatingsystems to provide a arge g mp; pri g lit Fl ta lllill't ldD cr me EDGARC. W IL EY, OF. LSZ'NCHBURG, VIRGINIA, ASSIGNUB TO THE SIMPLEX HEATING-SECIALTY GQMPANY, 0F LYNCHBURG, VIRGINIA, A. CORPORATION OF VIRGINIA.

OALEBBA'EING EADIATUR-VALVE.

application filed @ctcber 31,

To all whom it may, concern e it known that I, Essen ll iner, a r izenof the United Pita iding at llynchburg in the county t Y ll and State ofVirginia, have invented a new and useful Calibrating Radiator-Valve, oiwhich the following is a specification.

s invention has reference to radiator 5. ill valves and its objectds toprovide a vave for the purpose which may be readily adapt ed toradiators of difierent sizes through a relatively wide range, wherebybut one size of valve will answer for many dillerent sizes of radiators.

It is customary in installing steam or valve for large radiators and asmall valve .for small radiators and also to provide variousintermediate sizes all of which that a relatively large stock of variousof valves must be lcept on hand-oi obtained. This means the prot inarypatterns by the manufacti c investment of a considerable :u'nouut ofmoney which may prove to be a dead invesu v meat or a very slowly movingone.

th the present invention but one set 1 r .1 A "L. 1 of patterns 1Sneeded, and the necessity o1 n'oviding a large stock of seldom usedsizes of valves is obviated.

With the present invention the valve is made to have a maximum openingcapable 1 Ly h l f -,}'1 in supplying t ai es in 1a 01s or. a lion thevalve is adapted and the opening an t mg movements of the valve arecontnt in extent irrespective of the size of cater to which thevalve'may be applied. "pen ate for theditlerence in sizes in. radiate sthe movable member of the valve structure is provided with an adjustablebrating plug having a movement of admcnt lengthwise of the movable valveELlHlJQT so as to reduce or throttle the passage thr' ugh the valve tothe proper extent to adapt the valve structure to radiators of dilicrent sizes. In order to bring this about the. adjustable calibratingplug is made conoidal or approximately parabolic, while the steam or hotWater port or passagein .WlllCll the movable valve member seats isSpecification of Letters Patent.

Patented Jan. 18, 1916.

Serial No. 869,584,

with the understanding that the term may include as near an approach toa zero length of cylindrical port as is feasible in practice. The ideaof the colloidal calibrating plug constitutes a feature of anotherapplication filed by me on January 14:, 1914, tor a radiator valve underSerial No. 812,102,.wherein claims are made to the calibrating plug, forwhich reason no claims are made herein to such plug per se.- The presentinvention is in the nature of an. improvement on the valve disclosed inthe aforesaid application whereby adjustments of the calibrating plug toadapt the radiator valve structure to radiators of different sizes canonly be made by removing the major portion of the valve structure fromthe valve casing or by a manipulation ordinarily unknown to the owner oroccupant of the building in which the heating system is installed. Thisis important since for economical operation the aives should be properlyadjusted when installed and thereafter left alone. With the radiatorvalve structure of the aforesaid application the calibrating plug isreadily accessible by the simple expedient of removing a cap, whichoperation might be easily discovered by the occupant ofthe' building orsome other person unappreciative of the value of the close adjustmentand the proper adjustment of the valve interfered with. With theprescntinvention the calibrating plug is accessiblefor adjustment onlyby the removal of the valve stenuvalve stem carrying bonnet and. movablevalve member with the plug all from the valve casing, whereupon thecalibrating member may be adjusttempted by an unskilled operator.

The invention will be best understood from a consideration of thefollowing detailed description, taken. in connection with theaccompanying drawings forming a part of this specification, with thefurther understanding thatwhile the drawings show a practical form ofthe invention, the latter is not confined to any strict conformity withthe showing of" the drawingsbutniay be changed and modified so long assuch changes and modifications mark no material departure from thesalient features of'the dinal central section of a valve embodying thepresent invention, with some parts shown in elevation, and the movablevalve member being shown in the closed position. Fig. 2 is a viewsimilar to that of Fig. 1 but with more parts shown in elevation and thevalve for the largest capacity. Fig; 3 is a plan view of the valve on asomewhat smaller scale than theother figures and showing the handle in'an intermediate position. Fig. 4 is a section on the line 44 of Fig. 1.Fig. 5 is a section on the line 5-5 of Fig. 1.

Referring to the drawings there is shown a valve casing 1 having aninterior web 2 provided with a port or passage 3 at one 'end of whichthere is formed a valve seat 4 axially interiorly and the casing has anthreaded neck 5 and aside exteriorly threaded neck 6 for theattachmentof the valve to the steam pipe and radiator,respectively. Thatend of the casing 1 remote from the neck 5 is formed with an exteriorlythreaded neck 7. The parts so far described may follow the generalarrangement of radiator valves of the globe type with the port 3 ofcylindrical shape and of short axial extent. The port 3 so' far ascertain features of the present invention are concerned 'might .beotherwise shaped so long as .the edge 3 of the port where it joins thevalve seat 4 is circular. Since it is the edge 3 which is of importance,the remainder of the length of the port 3 may beactually expanded in adirection away from the valve seat 4,- but customarily the port 3 ismade cylindrical throughout. 'It will be understood, however, thatwhether the axial length of 'the port 3 be zero sofar as its cylindricalform. is 0on cern'ed, or Whether the entire length of the port 3 becylindrical, the term cylinder as applied to the port is to includeeither arrangement.

Entering the casing 1 through the neck 7 is a bonnet 8 having anintermediately located exterior circumferential and laterally extendedflange 9 adapted to. rest.0 n the outer end of the neck 7. Since in theusual installed position of the valve the neck 7 is uppermost, theflange 9 maybe described as resting upon'the upper edge of the neck 7 Iand further definitions of position occurring hereinafter will be withrespect to .the installed position of the valve structure. 1 The bonnet8 below the flange 9 enters the neck 7 and there is interiorlycylindrical and on diametrically opposite sidesis formed withlongitudinally disposed slots 10 entering the bonnet from the loweredge. Thebonnet 8 is held to the neck 7 by a thimble nut -11 indicatedin the open position and adjusted 19 and provided circular .lQQ g handle3 which may have the usual external hexagonal form for the applicationof a wrench and isapplied to the exterior threadedportion of the neck7.- The nut 11 is provided at one 'end with an inwardly directed radialflange "12, asis customary, to'fengage the flange 9-,. andso lock thebonnet 8 to the neck 7 and through it to the casing 1. By loosenmay bereadily ing the nut 11 the bonnet turned about its longitudinal axiswhich coincides with --the longitudinal axis of the casing 1 fora'purpose whichwill hereinafter appear.

an .interior web 13 with a'central passage 14 therethrough, while nearthe upper end The bonnet 8 at an intermediate pointhas i 1 8O of thebonnet is an exterior circular flange 15 forming a seat fora-dialplate16 held to the bonnet against the flange 15 by a nut 17,, thecorresponding upper end of the bonnet being threaded for the applicationof the nut 17. Extending lengthwise throughthe bonnet is 'a valve stem'18 having its upper end projecting above the upperend of the" bonnetand there threaded as indicated at pose to be described. The valvestem-ex.- tends through the passage 14 and below this with a nut 20 fora purpassage is expanded into a head 21 with the? .end adjacent to theweb 13 formed into an;

outstanding circular face toward the web 13 a circular rib 23- flange 22having onj 'the' matching the space between two concentric ribs 24 on'the. under face of the web 13; Lodged within the bonnet '8'. be? tweenthe web 13 and flange 22'is a packing" ring 25 entered by the ribs 23and 24, which latter serve to increase the packing surfaces withoutinterference ,with turning -movements since the ribs 23 and 24 maybe beveled and terminate in relatively sharp edges where facing each other.

At a point above the web 13 the valve stem 18 is"'la terally expandedand there formed with a circular series of longitudinally disposed ribs26 to which is applied an interiorly groovedend- 27 of a sleeve 28surrounding the valve stem 18 within that portion of-the bonnet 8above"the web 13. The interior ofthe sleeve 28. is

sufficiently spaced from the valve stem- 18 toprovide room foracompression spring 29 held with one end against the end 27 on the sleeve28 by the nut 20 between which nut and the spring thereis interposed awasher30. The sleeve 28 islong enough'to project through the upper openend of thebonnet and terminates" in an exterior-1y threaded portion 31for the reception. of a I cap nut-32 inclosing the nut 20. The sleeve 28betweenthe upper end of the bonnet and the cap nut is to which isapplied a hand-.-.

hold member 34 which may lie-made of some material other than metalbothfor protection of the hand of the operator against the ormed into alaterally protwo extremes represented to the studs 36 with suitableindicia which in the present instance consists of the words On. and Oil,while between these words in position to be are position indiciaindicative of fractional portions of the movement between the bythe'words On and Oltl. In the present instance'the dial has markings 37and the fractional indicaand 3/4. Of course, any other v tions 1/4, 1/2

indicating means may be employed, but it is usually sutficient that theoperator be apprised particular fractionalposition 1 dicated and the twoextremes showing that c fluid passage through the valve is either y cpenor fully closed. To further seal 'e a packing gasket 38 is introductdbetween the web 13 and the lower end sleeve 28.

The head 21 of the valve stem 18is exteriorlv screw threaded, asindicated at 39, and enters a cup-shaped member or nut 40 which in, turnis irrteriorlf, screw-threaded as indicated at 41.

outstanding lugs The exterior'oi the nut 40'at the screw threaded end isformed with 42 entering the recesses 10. Fixed to the closed end of thenut 40, which closed end is indicated at 43, is one end of a stem 44 inturn carrying a socket member or valve plug 45 having a closed end 46adtransversed by the pointer jacent to the closed end 43 ofthe nut 40but spaced therefrom by -a circular rib 47 serving to provide a packingmeans between the two members, one of whiclnas will hereinafter appear,be turned axially with relation to the other Where the stem 44 extendsthrough the closed end or base of the plug 45 it is rounded orcylindrical as indicated at 48, while beyond this cylindrical portionthe stem 44 is made noncircular and usually square, as indicated at'49,while that end of thesquare portion of the stem 49 remote from thecylindrical portion 48 is termed into a laterally expanded head 50. Theinterior of the plug 45 is screw-threaded, ,as shown at 51, and fittedto this screwthreaded portion of the plug is a correspondinglyscrew-threaded end of,,an0ther plug 52 having the end remote'fromthatentering the plug 45 counterbored, as shown at The end of the plug 52remote from the counterbore end is formed with a square passagetraversed by the square portion 49 of the stem 44,*while the head 50 islodged in the counterbore or cavity 53, The exterior of theplug 52 isconoidal or approxiplug 45 or the stem 44 somewhat extended lengthwiseof the casing for apurpose which will presently appear. The calibratingplug52 has an extent of longitudinal movement along the squared portion49 of the stem 44 permitting it to be housed within the socket in theplug 45 or projected for the greater portion of its length beyond saidplug, the adjustments of the calibratingplug being by screwing. it into"or out of the cup or socket carrying it. When the parts are allassembled the plug 45 is held against rotation by the wing 55, but.under certain circumstances either the may berotated with respect to theother.v Since the stem 44 is held against rotation with respect to thecalibrating plug or the squared portion 49 of said stem while the plug45 is free to r0- tate with respect to the stem because of the round orcircular part 48'where the stem traverses the plug, the rotativemovement of either causes the calibrating plug to be screwed into or outof the plug 45. Furthermore, the plug 45 constitutes the movable memberof the valve structure, and that end receiving the calibrating plug isshaped as shown at 56 into conformity with the valve seat 4, so as toengage the valve seat 4 in a manner to close the port 3, or whenwithdrawn from the valve seat to open the port 3. The extent of travelof the movable valve member 45 is always the same and is brought aboutby a half turn of the handle actuating the valve stem 18 to a likeextent, while the screw threads 39 and 41 have such a pitch that thehalf turn revolution of the valve stem 18 is sufiicient to actuate themovablevalve member frpm the fully closed positions to the fully openposition, or vice ver'sa. Inpractice this movement is aboutthree-sixteenths of an inch more or less, and is participated in by thecalibrating plug E It the plug 52 be in the fully projected position itis so related to the port 3 that when the movable valve member 45 isfully lifted or in the fully open" position, the

wider end of the calibrating plug is still so is in the fully openposition is that permitting a flow of steam or other fluid to theradiator requiredfor a radiator of the largest size for'which the valvestructure is adapted.

In practice a valve with three-quarter inch pipe connections will supplysteam toall radiators from five feet to one hundred and fifty feetradiating surface. If the valve be applied to, say, a five foot radiatorand has an effective opening adapted to a ten foot radiator the excessof steamsupplied, considering the system-as a steam heating system, issimply wasted and the valve is therefore uneconomical at the full vvalve plug the same movement of the main I steam.

brating plug may be adjusted.

calibrating plug.

valve member 45 from closed to open posi: tion will cause only theproportionate amount of steam to pass for which the cali- The closeapproach to a conoidal or parabolic form provides for the range ofadjustment throughout the great difference in sizes of radiators betweenthe minimum and maximum by corresponding movements of the For instance,the parts are so adjusted that a certain number of turns of thecalibrating plug is required toeause the adjustment of the plug from oneextreme to the other and the shape of the calibrating plug withreference to the port 3 is such that each full turn of the calibrat ingplug about its longitudinal axis means a certain definite differencein-the supply of Suppose that the calibrating plug when fully projectedis in proper relation to the main valve member 45 to cause an effectiveopening of the port 3 on the full open position of the valve to supply aradiator of five foot surface. This will mean that a single turn of thecalibrating plugabout its longitudinal axis will adjust the valve forthe next size of radiator, two turns will adjust'the radiator valve forthe second larger size, and so on throughout the range of sizes up tothe full size radiator for which the valve is designed, this being underthe assumption that radiators diifer in size by definite steps. Anothermanner of adjustment is that for a radiator-of fifty or one hundred feetcapacity the valve is set by first moving the calibrating plug to thefully projected position and then turning it a certairrdefinite numberof revolutions to cause it to move into the plug carrying it,

when the person installing the system knows that'fl the valve is set toabout the proper 'the bonnet.

position for the radiator to which it is applied.

Ordinarily in installing asystem the valves are merely approximated tothe proper size and then-when the completed system is tested out eachvalve is more delicately adjusted. This may be accomplished the nut 11is loosened and this permits aturning movement of the bonnet 8 and allthose parts carried by it, except the valve plug 15 constituting themain valve member, since this member cannot turn because of theengagement of some one of the lugs 54; with the Willg' The calibratingplug, however. participates in any turning movement of the bonnet 8 sothat the plug or socket member 45 being held against rotation thecalibrating plug 52 is screwed into or out of the socket in accordancewith the number of turns imparted to the bonnet S. N ow by turning thebonnet 8 until the plug 52is fully projected and then reversing themovement of the bonnet 8 until a definite number of turns has beenimparted to it the calibrating plug is quite accurately adjusted for theparticular size of radiator to.

which the radiator valve is applied, and any further and more delicateadjustment may be brought about by. partial turns of .ticularinstallation may demand that the handle 33 project from the valve at acertain angle with relation to the neck portion :6 or

.the longitudinal line of the radiator or pipe.

Under these circumstances thenut 17- may be loosened and the index 16 beturned to the desiredposition, or the nut'll may be entirelydisconnected from the neck 7 permitting the lifting of the bonnet untilthe bonnet entirely from the casing l and'then the socket 45 may beturned to the proper position to cause the desired projection of thecalibrating plug 52 in agreement with the size of the radiator to whichthe radiator valve is to be oris attached.

The diiliculty of access to the calibrating plug adjusting means is aneffective preventive against tampering with. the valve after it hasoncebeen installed, so that there After the-proper adjustment lugs 54are disengaged from the wing 55,

is ample assurance that the installed system will continue to operateproperly and eco: nomically.

When the full capacity of the radiator i desired the handle of the valveis .rn that the indicatorfinger 35 points to th word On but it" it isdesired toobtai less amount of heat from the radiator handle is turnedso that the indicator point to some intermediate position. Usually thindication of three intermediate t'ractiona. positions is suilicient,and in the draivin the three usual intermediate positions are indicated.This does not, however, preclude the indication of other innit-ions andunder some circumstances the designation of the intermediate positionsby figures may omitted. Usuall however it is adva geous to have the-fractional positions named uponth'e dial plate. r

The off position does not actually need a stop lug 36, since themanipulating handle will be arrested at such position by the closure ofthe main valve member or socket against the valve seat, but this stopbecoi of value when it is desired to fully pr the calibrating memberafter loosening the nut 11, for the rotation of the bonnet 8 and *partscarried thereby can then be caused by grasping the handheld and movingit in.

the same direction that-is required to close the valve, whereupon thecalibrating plug is projected until sto ped by the engagement of thehead 50 against the closed end or the counterbore 53. The frictionalengagement of the parts permits the reverse rotation of the bonnet 8 bythe handle without causing the handle to rotate with reference to thedial. I

l/Vhat is claimed is z- 1. A radiator valve comprising a valve casing, abonnet carried by the casing, a rotatable valve stem in the bonnet, areciprocable membe r threaded on the stem and guided in the bonnet, avalve plug carried by the reciprocable member in rotatable relationthereto, said valve plug and easing having connections forholding thevalve plug againgt rotation but permitting reciprocatory movementsthereof, a. calibrating plug 'carried'by the valve plug in telescopingrelation thereto, and connections between the calibrating plug and thereciprocablc member forholding them in nonrotatable relation one to theother.

2. A radiator valve comprising a valve casing, a bonnet carried by thecasing, a rotatable valve stem in the bonnet, a reciprocable memberthreaded on the stem and guided in the bonnet, a valve plug carried .bythe reciprocable member in rotatable relation thereto, said valve plugand easing having connections for holding the valve "plug againstrotation but permitting reciprocatory movements thereof, a calibratingplug carried by thevalve plug in teieecc and connections between I n nonother, the calibre. n 'lve plug being provided r7 an d connections forcausing We oping nwvements of the calihran w e .n and out of the valveplug by rotative i rflvnillfilififi of the valve plug or. he recip oeatery member.

A raiiator, valve comprising a easing, a hon et cairn l. by casinrotatable valve stem in bonnet, a roe-able hreaded on the stem id plus;into and out of the valve plug by rotative movements oi the valve plugor reciprocatory member, and the bonnet and valve casing havingconnecting means permitting tative movements of tie bonnet and p carriedthereby with respect to the valve ing to cause telescoping movements thecalibrating plug into and out of the valve plug.

4. it radiator valve comprising a va casing, a bonnet carried thereby, aplug carried by the bonnet in rotatable re. a tion thereto with thevalve plug and easing provided with. connections for holding the valveplug againstrotation when in ope. tive position Within the casing, and acali brating plug in telescoping relation to the valve plug and providedwith connections with the bonnet for causing telescoping movements ofthe calibrating plug into and out of the valve plug by rotativemovements of either the valve-plug or the bonnet.

A radiator valve comprising valve casing, a bonnet carried by thecasing, valve operating means carried by the bonnet,

. operating means carried by .-the bonnet, a

valve plug connected to the valve crating means, and ,a calibrating plugcarried by. the

valve plug in telescoping relation thereto, the valve plug being inrotatable relation to vided with coacting stop members forhold ing, theplug against rotative movements when in operativeposition within theeasmg, and the bonnet and easing being pro- .vided' with cotiperatingmeans for holding the bonnet fixedly to the casing or releasing it" torotative movements Within the casing or removal from the casing, atwill.

'7.'A radiator valve comprising a valve easing, a bonnet mounted on thecasing, valve operating means carried by the bon net, a valve plugcarried by the valve operatingmeans in relatively rotatable relationthereto,"-afixed stop member within the casing, a circular series ofstop members onthe valve plug for coaction with the stop member'in, thecasing to hold the valve plug against rotative movements Qwhile permitvting reciprocatory movements thereof, and a calibrating plug inrotatable relation to and telescoping relation with the valve plug andconnected to the valve operating means for participation in movements ofthe bonnet for the telescoping adjustment of the cali'-' ,brating plugby rotative movements of.

either the valve plug or the bonnet.

.8. A radiator valve comprising a casing, valve operating devicescarried thereby and; provided with a normally non-rotatable part, "avalve plug consisting of an inter-is] orly threaded cup-shaped membercarried by the valve operating devices Within and in non-rotatablerelation to the casing, a calibrating plug threaded into the-interiorlythreaded cup-shaped plug, and connections between the calibrating memberand the normally non-rotatable part of the valve oper ating. devices forholding the calibrating member normally non-rotatable and for causingadjustment of the calibrating member in the valve plug by rotativemovements of the normally non-rotatable part ofthe valve operatingdevices. -9. A valve structure provided with a valve seat, a valve plug,means for moving the valve plug toward and from the valve seat, thevalveplug being swiveled' to the op-.

erating means,'a calibrating plug threaded into the valve plug, andconnections-between-the valve pluggoperatmg means and v the calibratingplug ifor holding ,the calibrating plug in nonrotatab'le relation tosaid operating means;" -vvhereby the telescoping movements of thecalibrating plug are broughtabouteither by rotatative move;

ments of thevalve plug operating means or of the valve'plug.

. 10. A valve structure; provided with valve .seat, a valve-plug, meansfor moving the valve plugtoward and from the valve seat ,'-thevalveplug' being rotatably connect- I ed to the operating means, 'a'calibrating plug threaded into the valve plug, and connectionsbetweenthe valve plug operating meansandthe'calibratiiig plug forholding the'calibrating plug in nonrotatable relation tosaid operatingmeans, whereby the teleconnecting the bonnet to the valve casing in.fiXed relation'one to the other, a valve plug carried by the bonnet androtatablewith relation thereto, coacting means on the valve plug-andeasing for-holding the plug against rotative movements, rotatable valveoperat-.

for rotative movements therein, means for e ing means-carried by thebonnet and having a range of operative movement with relat on to theopenlng and closing 0: the valve oil-approximately a half revolutionwith re- I spectfto the bonnet, and a calibrating plug connected to the.bonnet in telescoping threaded relation to the valve plug, wherebyrotative movements of either the bonnet or the valve plug cause theadjustment of the calibrating plug into and out of'the valve plug andthe operating means for the valve plug may be utilized for producing therotative movements of the bonnet for effecting the adjustment of thecalibrating plug.

12. A radiator valve provided With a valve seat and a valve plugtherefor, operating means for the valveplug for moving it toward andfrom the valve seat, a calibrat ing plug threaded to the valve plug fortele- .scoping movements with. relation thereto,

and connections between the calibrating plug and the valve. plugoperating meansv comprising anoncircular pin along which the calibratingplug is movable longitudi nally and by which it is held against rotationon the pin, said pin being in fixed relation to the valve operatingmeansand the valve plug being mounted on the'pin for relative rotationthere'about as an axis.

' 13. A valve structure comprising a valve casing having a valve seat,an interiorly threaded cup-shaped valve plug having an exterior seriesof spaced lugs thereon, a stop member within the valve casing in thepath of the lugs, a pin extending axially through the valve plug and onwhich the plug is mounted for relative rotation with respect to the pinand said pin being of noncircular contour within the threaded portion ofthe valve plug and terminating in an expanded head, a calibrating plugthreaded into the threaded poition of the valve plug and axiallytraversedby the noncircular portion of the pin, said calibrating plughaving a cou-nterbore for receiving the expanded head of the pin, andvalve operating means to which the pin is fixed, said pin constitutingthe supporting means for both the valve 1 ally traversed by thenoncircular portion of thepin, said calibrating plug having acounterbore for receiving the expanded headof the pin, and valveoperating means to -Which the pin is fixed, said pin constituting thesupporting means for both the valve plug and the calibrating plug, andsaid.

valve stfucture being provided With means for holding that portion ofthe valve operating means carrying the pin against rota-- tive movementand for releasing it to rotative movements.

1 5. A valve structure comprising a valve casing having a valve seat, aninteriorly threaded cup-shaped valve plug having an exteriorcircumterentlal series of spaced lugs thereon, a stop member Within thevalve casing in the path-of the lugs, a pin extending axially throughthe valve plug and on which the plug is mounted for rela-- "tiverotation with respect to the pin, and

said pin being of noncircular contour within the threaded portion of thevalve plug and also terminating in an expanded head,

a calibrating plug threaded into the threaded portion of the valve plugand axially traversed by the non-circular portion of the pin, saidcalibrating plug having acounterbore for. receiving the expanded head ofthe pin and said pinconstituting the supporting means for both the valveplug and the calibrating plug, a bonnet with longitudinal enteringrecesses, clamping connections between the bonnet and the valve casingfor locking the bonnet to said casingor releasing it to rotativemovement within the easing, at will, and valve'operating means to Whichthe pin is fixed, comprising a threaded member carrying the pin andplugsand .providednvith lugs entering the recesses in the bonnet, and"avalve spindle in coactive relation to the threaded member for moving thelatter together with the plugs lengthwise of the valve casing by alimited rotative movement of the valve spindle.

In testimony, that I claim the foregoing as my own, 1 have heretoaflixed my signature in the presence of two Witnesses.

EDGAR C. WILEY.

Witnesses CHAS. E. BURKS, J. A. ANDERSON, Jr.

